| /** |
| * Copyright (C) 2009 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.google.inject.spi; |
| |
| import com.google.inject.Binder; |
| import com.google.inject.TypeLiteral; |
| import com.google.inject.matcher.Matcher; |
| |
| /** |
| * Binds types (picked using a Matcher) to an type listener. Registrations are created explicitly in |
| * a module using {@link com.google.inject.Binder#bindListener(Matcher, TypeListener)} statements: |
| * |
| * <pre> |
| * register(only(new TypeLiteral<PaymentService<CreditCard>>() {}), listener);</pre> |
| * |
| * @author jessewilson@google.com (Jesse Wilson) |
| * @since 2.0 |
| */ |
| public final class TypeListenerBinding implements Element { |
| |
| private final Object source; |
| private final Matcher<? super TypeLiteral<?>> typeMatcher; |
| private final TypeListener listener; |
| |
| TypeListenerBinding(Object source, TypeListener listener, |
| Matcher<? super TypeLiteral<?>> typeMatcher) { |
| this.source = source; |
| this.listener = listener; |
| this.typeMatcher = typeMatcher; |
| } |
| |
| /** Returns the registered listener. */ |
| public TypeListener getListener() { |
| return listener; |
| } |
| |
| /** Returns the type matcher which chooses which types the listener should be notified of. */ |
| public Matcher<? super TypeLiteral<?>> getTypeMatcher() { |
| return typeMatcher; |
| } |
| |
| public Object getSource() { |
| return source; |
| } |
| |
| public <T> T acceptVisitor(ElementVisitor<T> visitor) { |
| return visitor.visit(this); |
| } |
| |
| public void applyTo(Binder binder) { |
| binder.withSource(getSource()).bindListener(typeMatcher, listener); |
| } |
| } |